I ask this seriously: is it really abused that often?  Maybe I haven't noticed it because it's a problem in sections I don't visit that you do (like P&S, which I think you post in), but I haven't seen members changing the thread title all that much.  Or it could be that I'm just not paying attention to it since there's really no need to.

I think when you brought this up last time I supported the idea and I still do.  It's a small change, but there's really no reason why someone ought to be able to modify a thread's title in their post.  Having a title for your post on any discussion board is annoying and unnecessary, especially if you're required to put something in that field--and on bitcointalk I don't see any reason why we even need a title repeated with every post.